I think Herbs should have a lag after you use them.
I think that 2 rounds, as most skills, is quite an interesting wait time.
This will prevent PC's from reacquiring sanctuary and acting, after a successful dispel, in less time than a caster can respond.
While we are at it, how can you light a herb and smoke it in the heat of battle.
This kind of mastery should be reserved to character classes that have a mastery in preserve, like thieves and ninjas...

its also pretty hard to cast a spell after being cleaved in the skull with a battle axe... there are so many whitty things i wanted to say here but most of them are pretty mean so i'll just say.. no thanks.
Disagree - herbs already have negative effects if players choose to use them.
Lytholm.
yeah herb should be left alone. and there is a lag if you fail.
Not if you're a junkie they don't. 
Not if you're a junkie they don't. 
but you lose another potential perk, like sickly which is really awesome for caster types and impatient folks like myself.
I never go for it because of it's side affect.
Mya, I see a trend in most of your idea posts. You seem to have a bias towards improving the ability of c/c classes to survive. None of the c/c classes need help living. Melee chars do not get scrolls, so they lose access to the best healing for neuts/goodies. They do not get staves so they lose a good staff that heals. What they get is fast healing, which casters also get. I see no reason why smoke a leaf lags you as long as a fire giant slamming into you in the heat of battle.
If this is the trend let's just eliminate OP melee classes and play only necros, bmgs, clerics, shammies, healers, and invokers. That should balance the caster vs melee quite easily.
Really though, try playing a melee, most commands you enter lag you for two rounds. So if I dirt, you return with a dispel, I have another round before I can even move. Now if your a shaman, or necro you can blind me, or increase my command lag. Now if I am blind, I cannot resanc. If a caster is blind, they can instantly reset sanc. A blind dispelled melee is up a creek. That combined with the fact your average invoker can cast sanctuary over 1000 times before not having the mana to do so, the average melee has, as per my experience, about 20 sources of sanc, usually more. Do the math yourself, this game lends itself heavily to mages already. Gimping melee buffs is just tipping the scales.
Mya, I see a trend in most of your idea posts. You seem to have a bias towards improving the ability of c/c classes to survive. None of the c/c classes need help living. Melee chars do not get scrolls, so they lose access to the best healing for neuts/goodies. They do not get staves so they lose a good staff that heals. What they get is fast healing, which casters also get. I see no reason why smoke a leaf lags you as long as a fire giant slamming into you in the heat of battle.
If this is the trend let's just eliminate OP melee classes and play only necros, bmgs, clerics, shammies, healers, and invokers. That should balance the caster vs melee quite easily.
Really though, try playing a melee, most commands you enter lag you for two rounds. So if I dirt, you return with a dispel, I have another round before I can even move. Now if your a shaman, or necro you can blind me, or increase my command lag. Now if I am blind, I cannot resanc. If a caster is blind, they can instantly reset sanc. A blind dispelled melee is up a creek. That combined with the fact your average invoker can cast sanctuary over 1000 times before not having the mana to do so, the average melee has, as per my experience, about 20 sources of sanc, usually more. Do the math yourself, this game lends itself heavily to mages already. Gimping melee buffs is just tipping the scales.
you said everything i was thinking.
Mya, I see a trend in most of your idea posts. You seem to have a bias towards improving the ability of c/c classes to survive. None of the c/c classes need help living. Melee chars do not get scrolls, so they lose access to the best healing for neuts/goodies. They do not get staves so they lose a good staff that heals. What they get is fast healing, which casters also get. I see no reason why smoke a leaf lags you as long as a fire giant slamming into you in the heat of battle.
If this is the trend let's just eliminate OP melee classes and play only necros, bmgs, clerics, shammies, healers, and invokers. That should balance the caster vs melee quite easily.
Really though, try playing a melee, most commands you enter lag you for two rounds. So if I dirt, you return with a dispel, I have another round before I can even move. Now if your a shaman, or necro you can blind me, or increase my command lag. Now if I am blind, I cannot resanc. If a caster is blind, they can instantly reset sanc. A blind dispelled melee is up a creek. That combined with the fact your average invoker can cast sanctuary over 1000 times before not having the mana to do so, the average melee has, as per my experience, about 20 sources of sanc, usually more. Do the math yourself, this game lends itself heavily to mages already. Gimping melee buffs is just tipping the scales.
I 100% agree.
Mya, I am really getting tired of your biased comments and suggestions. You really need to start thinking less about your own and start thinking about the game as a whole.
Whilst i agree that Mya has a few biased areas - i do think that the fact that people can smoke a herb and get sanctuary in combat, without lag is a bit overpowered.
Make it so you can't use herbs in combat and it would be fine, most people have to flee after getting dispelled so they can put their spells back up, why should herbs be different?
Because herbs rot, they aren't unlimited, they have negative side effects, they last nowhere near as long as the sanctuary spell, they are easier to dispel, they are often not around in any kind of number, they can be stolen, they can be sacced when you die.
So your sanc is down? You still have prot shield and the easiest and longest lasting flight in the game to use to make your escape. Not to mention you can word right out of combat, which a melee class cannot do without a lot of fiddling around - and even then, they can spill the potion.
I wouldn't have any problem with introducing a half-round, maybe at most a round lag on it... but two rounds? That's far too harsh. "Flee, quaff vial" doesn't take two rounds.
And keep in mind that through socketable weapons, every class in the game has access to blinding abilities. If you want to prevent your enemy from sancing up on command, invest in them.
Whilst i agree that Mya has a few biased areas - i do think that the fact that people can smoke a herb and get sanctuary in combat, without lag is a bit overpowered.
Make it so you can't use herbs in combat and it would be fine, most people have to flee after getting dispelled so they can put their spells back up, why should herbs be different?
because their consumables and there isn't an infinite source, and they have drawbacks, and they cant do it while blind, and their sanctuary can be stolen directly out of their inventory.
make it so mages can only cast 20 sanctuaries a day and give it an addiction, make it so mages cant do it while blind, and allow us to steal it from their inventories THEN AND ONLY THEN will i listen to you QQ about how a melee can use an herb in combat. You CANT be serious. the only 1 perk to melee sanc amongst 20 bad things and u want it nerfed. Why is everyone so nerf happy?
You can also eat a sparkling pill and receive sanctuary mid battle too..
mages can also use herbs when they are in a fight that forces them to save mana.
I would personally like to see a reduction in skills/defenses for a round after smoking a herb while in battle. It makes sense that you cannot focus on dodging/parrying/blocking attacks while you are lighting one up. I vote no on the lag and yes on a round or so of reduced skill proficiency.
In my opinion, herbs are the counter to all the sick buffs that mages get, that melees typically don't have access to. Notice how 90% of the easy-to-get herbs are for melees? I like it that way - it allows melees to be more competitive with mages, without having to have as much reliance on equipment.
I don't see any point to causing there to be a detriment to using herbs mid-fight, since that is just one more point in the mages' favor.
You can also eat a sparkling pill and receive sanctuary mid battle too..
Was waiting to see who will mention this 
Next suggestion -> 2 rounds lag for eating pills.
You know Mya, I have a better suggestion. Why don't we give "cure critical" two rounds lag instead of one?